Combine the vinegar, honey, garlic, onion, and berries in a blender. Blend until smooth. With the blender running, carefully add the oil in a steady stream. Turn off the blender and stir in the poppy seeds. If possible, refrigerate for at least an hour before serving. Great served over mixed greens or with my Grilled Chicken & Berry Salad! Extra dressing keeps in the fridge for up to 5 days.
Raspberry Poppy Seed Vinaigrette